Book chapter
Evolving Mechanosensory Hair Cells to Hearing Organs by Altering Genes and Their Expression: The Molecular and Cellular Basis of Inner Ear and Auditory Organ Evolution and Development
Perspectives on Auditory Research, pp.163-182
Springer Handbook of Auditory Research, Springer New York
02/10/2014
DOI: 10.1007/978-1-4614-9102-6_10
Abstract
This chapter presents the history of discoveries in hair cell evolution, mechanosensory organ evolution (vestibular ears, lateral line, and paratympanic organ) and evolution of the auditory system and relates them to the molecular basis of their development and evolution. The mechanosensory hair cell, once recognized as a unique vertebrate cell peculiar to the mechanosensory organs of the inner ear and lateral line, can now be developmentally and molecularly linked to nonmechanosensory cells in vertebrates (the electroreceptive “hair cells” of many aquatic vertebrates) and other outgroups (various ciliated cells of diploblasts and triploblasts that share gene expression similarities. This progress in understanding the evolution of the vertebrate mechanosensory cell is put into the context of understanding the evolution of mechanosensory organs. Progress in this area hinges on molecular comparisons of eye and ear development and indicates that both organ types may share a “deep molecular homology” of a super regulator, the Pax genes. Evolutionary transformation of gravistatic sensors into sound pressure receivers happened multiple times in aquatic vertebrates but the transformation of the tetrapod system differs in many structural and molecular aspects from that in bony fish. The current state of our understanding of the molecular basis of this transition is reviewed and put into the historical context of ideas around this subject and their changes over time.
Details
- Title: Subtitle
- Evolving Mechanosensory Hair Cells to Hearing Organs by Altering Genes and Their Expression: The Molecular and Cellular Basis of Inner Ear and Auditory Organ Evolution and Development
- Creators
- Bernd Fritzsch - Department of Biology, College of Liberal Arts, University of Iowa, Iowa City, USAM.-Dominique Crapon de Caprona - Department of Biology, College of Liberal Arts, University of Iowa, Iowa City, USA
- Resource Type
- Book chapter
- Publication Details
- Perspectives on Auditory Research, pp.163-182
- Series
- Springer Handbook of Auditory Research
- DOI
- 10.1007/978-1-4614-9102-6_10
- eISSN
- 2197-1897
- ISSN
- 0947-2657
- Publisher
- Springer New York; New York, NY
- Language
- English
- Date published
- 02/10/2014
- Academic Unit
- Iowa Neuroscience Institute; Biology; Craniofacial Anomalies Research Center
- Record Identifier
- 9984071764702771
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